| 1 | /* |
| 2 | * Linux Ethernet device driver for the 3Com Etherlink Plus (3C505) |
| 3 | * By Craig Southeren, Juha Laiho and Philip Blundell |
| 4 | * |
| 5 | * 3c505.c This module implements an interface to the 3Com |
| 6 | * Etherlink Plus (3c505) Ethernet card. Linux device |
| 7 | * driver interface reverse engineered from the Linux 3C509 |
| 8 | * device drivers. Some 3C505 information gleaned from |
| 9 | * the Crynwr packet driver. Still this driver would not |
| 10 | * be here without 3C505 technical reference provided by |
| 11 | * 3Com. |
| 12 | * |
| 13 | * $Id: 3c505.c,v 1.10 1996/04/16 13:06:27 phil Exp $ |
| 14 | * |
| 15 | * Authors: Linux 3c505 device driver by |
| 16 | * Craig Southeren, <craigs@ineluki.apana.org.au> |
| 17 | * Final debugging by |
| 18 | * Andrew Tridgell, <tridge@nimbus.anu.edu.au> |
| 19 | * Auto irq/address, tuning, cleanup and v1.1.4+ kernel mods by |
| 20 | * Juha Laiho, <jlaiho@ichaos.nullnet.fi> |
| 21 | * Linux 3C509 driver by |
| 22 | * Donald Becker, <becker@super.org> |
| 23 | * (Now at <becker@scyld.com>) |
| 24 | * Crynwr packet driver by |
| 25 | * Krishnan Gopalan and Gregg Stefancik, |
| 26 | * Clemson University Engineering Computer Operations. |
| 27 | * Portions of the code have been adapted from the 3c505 |
| 28 | * driver for NCSA Telnet by Bruce Orchard and later |
| 29 | * modified by Warren Van Houten and krus@diku.dk. |
| 30 | * 3C505 technical information provided by |
| 31 | * Terry Murphy, of 3Com Network Adapter Division |
| 32 | * Linux 1.3.0 changes by |
| 33 | * Alan Cox <Alan.Cox@linux.org> |
| 34 | * More debugging, DMA support, currently maintained by |
| 35 | * Philip Blundell <philb@gnu.org> |
| 36 | * Multicard/soft configurable dma channel/rev 2 hardware support |
| 37 | * by Christopher Collins <ccollins@pcug.org.au> |
| 38 | * Ethtool support (jgarzik), 11/17/2001 |
| 39 | */ |
| 40 | |
| 41 | #define DRV_NAME "3c505" |
| 42 | #define DRV_VERSION "1.10a" |
| 43 | |
| 44 | |
| 45 | /* Theory of operation: |
| 46 | * |
| 47 | * The 3c505 is quite an intelligent board. All communication with it is done |
| 48 | * by means of Primary Command Blocks (PCBs); these are transferred using PIO |
| 49 | * through the command register. The card has 256k of on-board RAM, which is |
| 50 | * used to buffer received packets. It might seem at first that more buffers |
| 51 | * are better, but in fact this isn't true. From my tests, it seems that |
| 52 | * more than about 10 buffers are unnecessary, and there is a noticeable |
| 53 | * performance hit in having more active on the card. So the majority of the |
| 54 | * card's memory isn't, in fact, used. Sadly, the card only has one transmit |
| 55 | * buffer and, short of loading our own firmware into it (which is what some |
| 56 | * drivers resort to) there's nothing we can do about this. |
| 57 | * |
| 58 | * We keep up to 4 "receive packet" commands active on the board at a time. |
| 59 | * When a packet comes in, so long as there is a receive command active, the |
| 60 | * board will send us a "packet received" PCB and then add the data for that |
| 61 | * packet to the DMA queue. If a DMA transfer is not already in progress, we |
| 62 | * set one up to start uploading the data. We have to maintain a list of |
| 63 | * backlogged receive packets, because the card may decide to tell us about |
| 64 | * a newly-arrived packet at any time, and we may not be able to start a DMA |
| 65 | * transfer immediately (ie one may already be going on). We can't NAK the |
| 66 | * PCB, because then it would throw the packet away. |
| 67 | * |
| 68 | * Trying to send a PCB to the card at the wrong moment seems to have bad |
| 69 | * effects. If we send it a transmit PCB while a receive DMA is happening, |
| 70 | * it will just NAK the PCB and so we will have wasted our time. Worse, it |
| 71 | * sometimes seems to interrupt the transfer. The majority of the low-level |
| 72 | * code is protected by one huge semaphore -- "busy" -- which is set whenever |
| 73 | * it probably isn't safe to do anything to the card. The receive routine |
| 74 | * must gain a lock on "busy" before it can start a DMA transfer, and the |
| 75 | * transmit routine must gain a lock before it sends the first PCB to the card. |
| 76 | * The send_pcb() routine also has an internal semaphore to protect it against |
| 77 | * being re-entered (which would be disastrous) -- this is needed because |
| 78 | * several things can happen asynchronously (re-priming the receiver and |
| 79 | * asking the card for statistics, for example). send_pcb() will also refuse |
| 80 | * to talk to the card at all if a DMA upload is happening. The higher-level |
| 81 | * networking code will reschedule a later retry if some part of the driver |
| 82 | * is blocked. In practice, this doesn't seem to happen very often. |
| 83 | */ |
| 84 | |
| 85 | /* This driver may now work with revision 2.x hardware, since all the read |
| 86 | * operations on the HCR have been removed (we now keep our own softcopy). |
| 87 | * But I don't have an old card to test it on. |
| 88 | * |
| 89 | * This has had the bad effect that the autoprobe routine is now a bit |
| 90 | * less friendly to other devices. However, it was never very good. |
| 91 | * before, so I doubt it will hurt anybody. |
| 92 | */ |
| 93 | |
| 94 | /* The driver is a mess. I took Craig's and Juha's code, and hacked it firstly |
| 95 | * to make it more reliable, and secondly to add DMA mode. Many things could |
| 96 | * probably be done better; the concurrency protection is particularly awful. |
| 97 | */ |
| 98 | |
| 99 | #include <linux/module.h> |
| 100 | #include <linux/kernel.h> |
| 101 | #include <linux/string.h> |
| 102 | #include <linux/interrupt.h> |
| 103 | #include <linux/errno.h> |
| 104 | #include <linux/in.h> |
| 105 | #include <linux/slab.h> |
| 106 | #include <linux/ioport.h> |
| 107 | #include <linux/spinlock.h> |
| 108 | #include <linux/ethtool.h> |
| 109 | #include <linux/delay.h> |
| 110 | #include <linux/bitops.h> |
| 111 | |
| 112 | #include <asm/uaccess.h> |
| 113 | #include <asm/io.h> |
| 114 | #include <asm/dma.h> |
| 115 | |
| 116 | #include <linux/netdevice.h> |
| 117 | #include <linux/etherdevice.h> |
| 118 | #include <linux/skbuff.h> |
| 119 | #include <linux/init.h> |
| 120 | |
| 121 | #include "3c505.h" |
| 122 | |
| 123 | /********************************************************* |
| 124 | * |
| 125 | * define debug messages here as common strings to reduce space |
| 126 | * |
| 127 | *********************************************************/ |
| 128 | |
| 129 | #define filename __FILE__ |
| 130 | |
| 131 | #define timeout_msg "*** timeout at %s:%s (line %d) ***\n" |
| 132 | #define TIMEOUT_MSG(lineno) \ |
| 133 | pr_notice(timeout_msg, filename, __func__, (lineno)) |
| 134 | |
| 135 | #define invalid_pcb_msg "*** invalid pcb length %d at %s:%s (line %d) ***\n" |
| 136 | #define INVALID_PCB_MSG(len) \ |
| 137 | pr_notice(invalid_pcb_msg, (len), filename, __func__, __LINE__) |
| 138 | |
| 139 | #define search_msg "%s: Looking for 3c505 adapter at address %#x..." |
| 140 | |
| 141 | #define stilllooking_msg "still looking..." |
| 142 | |
| 143 | #define found_msg "found.\n" |
| 144 | |
| 145 | #define notfound_msg "not found (reason = %d)\n" |
| 146 | |
| 147 | #define couldnot_msg "%s: 3c505 not found\n" |
| 148 | |
| 149 | /********************************************************* |
| 150 | * |
| 151 | * various other debug stuff |
| 152 | * |
| 153 | *********************************************************/ |
| 154 | |
| 155 | #ifdef ELP_DEBUG |
| 156 | static int elp_debug = ELP_DEBUG; |
| 157 | #else |
| 158 | static int elp_debug; |
| 159 | #endif |
| 160 | #define debug elp_debug |
| 161 | |
| 162 | /* |
| 163 | * 0 = no messages (well, some) |
| 164 | * 1 = messages when high level commands performed |
| 165 | * 2 = messages when low level commands performed |
| 166 | * 3 = messages when interrupts received |
| 167 | */ |
| 168 | |
| 169 | /***************************************************************** |
| 170 | * |
| 171 | * List of I/O-addresses we try to auto-sense |
| 172 | * Last element MUST BE 0! |
| 173 | *****************************************************************/ |
| 174 | |
| 175 | static int addr_list[] __initdata = {0x300, 0x280, 0x310, 0}; |
| 176 | |
| 177 | /* Dma Memory related stuff */ |
| 178 | |
| 179 | static unsigned long dma_mem_alloc(int size) |
| 180 | { |
| 181 | int order = get_order(size); |
| 182 | return __get_dma_pages(GFP_KERNEL, order); |
| 183 | } |
| 184 | |
| 185 | |
| 186 | /***************************************************************** |
| 187 | * |
| 188 | * Functions for I/O (note the inline !) |
| 189 | * |
| 190 | *****************************************************************/ |
| 191 | |
| 192 | static inline unsigned char inb_status(unsigned int base_addr) |
| 193 | { |
| 194 | return inb(base_addr + PORT_STATUS); |
| 195 | } |
| 196 | |
| 197 | static inline int inb_command(unsigned int base_addr) |
| 198 | { |
| 199 | return inb(base_addr + PORT_COMMAND); |
| 200 | } |
| 201 | |
| 202 | static inline void outb_control(unsigned char val, struct net_device *dev) |
| 203 | { |
| 204 | outb(val, dev->base_addr + PORT_CONTROL); |
| 205 | ((elp_device *)(netdev_priv(dev)))->hcr_val = val; |
| 206 | } |
| 207 | |
| 208 | #define HCR_VAL(x) (((elp_device *)(netdev_priv(x)))->hcr_val) |
| 209 | |
| 210 | static inline void outb_command(unsigned char val, unsigned int base_addr) |
| 211 | { |
| 212 | outb(val, base_addr + PORT_COMMAND); |
| 213 | } |
| 214 | |
| 215 | static inline unsigned int backlog_next(unsigned int n) |
| 216 | { |
| 217 | return (n + 1) % BACKLOG_SIZE; |
| 218 | } |
| 219 | |
| 220 | /***************************************************************** |
| 221 | * |
| 222 | * useful functions for accessing the adapter |
| 223 | * |
| 224 | *****************************************************************/ |
| 225 | |
| 226 | /* |
| 227 | * use this routine when accessing the ASF bits as they are |
| 228 | * changed asynchronously by the adapter |
| 229 | */ |
| 230 | |
| 231 | /* get adapter PCB status */ |
| 232 | #define GET_ASF(addr) \ |
| 233 | (get_status(addr)&ASF_PCB_MASK) |
| 234 | |
| 235 | static inline int get_status(unsigned int base_addr) |
| 236 | { |
| 237 | unsigned long timeout = jiffies + 10*HZ/100; |
| 238 | register int stat1; |
| 239 | do { |
| 240 | stat1 = inb_status(base_addr); |
| 241 | } while (stat1 != inb_status(base_addr) && time_before(jiffies, timeout)); |
| 242 | if (time_after_eq(jiffies, timeout)) |
| 243 | TIMEOUT_MSG(__LINE__); |
| 244 | return stat1; |
| 245 | } |
| 246 | |
| 247 | static inline void set_hsf(struct net_device *dev, int hsf) |
| 248 | { |
| 249 | elp_device *adapter = netdev_priv(dev); |
| 250 | unsigned long flags; |
| 251 | |
| 252 | spin_lock_irqsave(&adapter->lock, flags); |
| 253 | outb_control((HCR_VAL(dev) & ~HSF_PCB_MASK) | hsf, dev); |
| 254 | spin_unlock_irqrestore(&adapter->lock, flags); |
| 255 | } |
| 256 | |
| 257 | static bool start_receive(struct net_device *, pcb_struct *); |
| 258 | |
| 259 | static inline void adapter_reset(struct net_device *dev) |
| 260 | { |
| 261 | unsigned long timeout; |
| 262 | elp_device *adapter = netdev_priv(dev); |
| 263 | unsigned char orig_hcr = adapter->hcr_val; |
| 264 | |
| 265 | outb_control(0, dev); |
| 266 | |
| 267 | if (inb_status(dev->base_addr) & ACRF) { |
| 268 | do { |
| 269 | inb_command(dev->base_addr); |
| 270 | timeout = jiffies + 2*HZ/100; |
| 271 | while (time_before_eq(jiffies, timeout) && !(inb_status(dev->base_addr) & ACRF)); |
| 272 | } while (inb_status(dev->base_addr) & ACRF); |
| 273 | set_hsf(dev, HSF_PCB_NAK); |
| 274 | } |
| 275 | outb_control(adapter->hcr_val | ATTN | DIR, dev); |
| 276 | mdelay(10); |
| 277 | outb_control(adapter->hcr_val & ~ATTN, dev); |
| 278 | mdelay(10); |
| 279 | outb_control(adapter->hcr_val | FLSH, dev); |
| 280 | mdelay(10); |
| 281 | outb_control(adapter->hcr_val & ~FLSH, dev); |
| 282 | mdelay(10); |
| 283 | |
| 284 | outb_control(orig_hcr, dev); |
| 285 | if (!start_receive(dev, &adapter->tx_pcb)) |
| 286 | pr_err("%s: start receive command failed\n", dev->name); |
| 287 | } |
| 288 | |
| 289 | /* Check to make sure that a DMA transfer hasn't timed out. This should |
| 290 | * never happen in theory, but seems to occur occasionally if the card gets |
| 291 | * prodded at the wrong time. |
| 292 | */ |
| 293 | static inline void check_3c505_dma(struct net_device *dev) |
| 294 | { |
| 295 | elp_device *adapter = netdev_priv(dev); |
| 296 | if (adapter->dmaing && time_after(jiffies, adapter->current_dma.start_time + 10)) { |
| 297 | unsigned long flags, f; |
| 298 | pr_err("%s: DMA %s timed out, %d bytes left\n", dev->name, |
| 299 | adapter->current_dma.direction ? "download" : "upload", |
| 300 | get_dma_residue(dev->dma)); |
| 301 | spin_lock_irqsave(&adapter->lock, flags); |
| 302 | adapter->dmaing = 0; |
| 303 | adapter->busy = 0; |
| 304 | |
| 305 | f=claim_dma_lock(); |
| 306 | disable_dma(dev->dma); |
| 307 | release_dma_lock(f); |
| 308 | |
| 309 | if (adapter->rx_active) |
| 310 | adapter->rx_active--; |
| 311 | outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev); |
| 312 | spin_unlock_irqrestore(&adapter->lock, flags); |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | /* Primitive functions used by send_pcb() */ |
| 317 | static inline bool send_pcb_slow(unsigned int base_addr, unsigned char byte) |
| 318 | { |
| 319 | unsigned long timeout; |
| 320 | outb_command(byte, base_addr); |
| 321 | for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) { |
| 322 | if (inb_status(base_addr) & HCRE) |
| 323 | return false; |
| 324 | } |
| 325 | pr_warning("3c505: send_pcb_slow timed out\n"); |
| 326 | return true; |
| 327 | } |
| 328 | |
| 329 | static inline bool send_pcb_fast(unsigned int base_addr, unsigned char byte) |
| 330 | { |
| 331 | unsigned int timeout; |
| 332 | outb_command(byte, base_addr); |
| 333 | for (timeout = 0; timeout < 40000; timeout++) { |
| 334 | if (inb_status(base_addr) & HCRE) |
| 335 | return false; |
| 336 | } |
| 337 | pr_warning("3c505: send_pcb_fast timed out\n"); |
| 338 | return true; |
| 339 | } |
| 340 | |
| 341 | /* Check to see if the receiver needs restarting, and kick it if so */ |
| 342 | static inline void prime_rx(struct net_device *dev) |
| 343 | { |
| 344 | elp_device *adapter = netdev_priv(dev); |
| 345 | while (adapter->rx_active < ELP_RX_PCBS && netif_running(dev)) { |
| 346 | if (!start_receive(dev, &adapter->itx_pcb)) |
| 347 | break; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | /***************************************************************** |
| 352 | * |
| 353 | * send_pcb |
| 354 | * Send a PCB to the adapter. |
| 355 | * |
| 356 | * output byte to command reg --<--+ |
| 357 | * wait until HCRE is non zero | |
| 358 | * loop until all bytes sent -->--+ |
| 359 | * set HSF1 and HSF2 to 1 |
| 360 | * output pcb length |
| 361 | * wait until ASF give ACK or NAK |
| 362 | * set HSF1 and HSF2 to 0 |
| 363 | * |
| 364 | *****************************************************************/ |
| 365 | |
| 366 | /* This can be quite slow -- the adapter is allowed to take up to 40ms |
| 367 | * to respond to the initial interrupt. |
| 368 | * |
| 369 | * We run initially with interrupts turned on, but with a semaphore set |
| 370 | * so that nobody tries to re-enter this code. Once the first byte has |
| 371 | * gone through, we turn interrupts off and then send the others (the |
| 372 | * timeout is reduced to 500us). |
| 373 | */ |
| 374 | |
| 375 | static bool send_pcb(struct net_device *dev, pcb_struct * pcb) |
| 376 | { |
| 377 | int i; |
| 378 | unsigned long timeout; |
| 379 | elp_device *adapter = netdev_priv(dev); |
| 380 | unsigned long flags; |
| 381 | |
| 382 | check_3c505_dma(dev); |
| 383 | |
| 384 | if (adapter->dmaing && adapter->current_dma.direction == 0) |
| 385 | return false; |
| 386 | |
| 387 | /* Avoid contention */ |
| 388 | if (test_and_set_bit(1, &adapter->send_pcb_semaphore)) { |
| 389 | if (elp_debug >= 3) { |
| 390 | pr_debug("%s: send_pcb entered while threaded\n", dev->name); |
| 391 | } |
| 392 | return false; |
| 393 | } |
| 394 | /* |
| 395 | * load each byte into the command register and |
| 396 | * wait for the HCRE bit to indicate the adapter |
| 397 | * had read the byte |
| 398 | */ |
| 399 | set_hsf(dev, 0); |
| 400 | |
| 401 | if (send_pcb_slow(dev->base_addr, pcb->command)) |
| 402 | goto abort; |
| 403 | |
| 404 | spin_lock_irqsave(&adapter->lock, flags); |
| 405 | |
| 406 | if (send_pcb_fast(dev->base_addr, pcb->length)) |
| 407 | goto sti_abort; |
| 408 | |
| 409 | for (i = 0; i < pcb->length; i++) { |
| 410 | if (send_pcb_fast(dev->base_addr, pcb->data.raw[i])) |
| 411 | goto sti_abort; |
| 412 | } |
| 413 | |
| 414 | outb_control(adapter->hcr_val | 3, dev); /* signal end of PCB */ |
| 415 | outb_command(2 + pcb->length, dev->base_addr); |
| 416 | |
| 417 | /* now wait for the acknowledgement */ |
| 418 | spin_unlock_irqrestore(&adapter->lock, flags); |
| 419 | |
| 420 | for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) { |
| 421 | switch (GET_ASF(dev->base_addr)) { |
| 422 | case ASF_PCB_ACK: |
| 423 | adapter->send_pcb_semaphore = 0; |
| 424 | return true; |
| 425 | |
| 426 | case ASF_PCB_NAK: |
| 427 | #ifdef ELP_DEBUG |
| 428 | pr_debug("%s: send_pcb got NAK\n", dev->name); |
| 429 | #endif |
| 430 | goto abort; |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | if (elp_debug >= 1) |
| 435 | pr_debug("%s: timeout waiting for PCB acknowledge (status %02x)\n", |
| 436 | dev->name, inb_status(dev->base_addr)); |
| 437 | goto abort; |
| 438 | |
| 439 | sti_abort: |
| 440 | spin_unlock_irqrestore(&adapter->lock, flags); |
| 441 | abort: |
| 442 | adapter->send_pcb_semaphore = 0; |
| 443 | return false; |
| 444 | } |
| 445 | |
| 446 | |
| 447 | /***************************************************************** |
| 448 | * |
| 449 | * receive_pcb |
| 450 | * Read a PCB from the adapter |
| 451 | * |
| 452 | * wait for ACRF to be non-zero ---<---+ |
| 453 | * input a byte | |
| 454 | * if ASF1 and ASF2 were not both one | |
| 455 | * before byte was read, loop --->---+ |
| 456 | * set HSF1 and HSF2 for ack |
| 457 | * |
| 458 | *****************************************************************/ |
| 459 | |
| 460 | static bool receive_pcb(struct net_device *dev, pcb_struct * pcb) |
| 461 | { |
| 462 | int i, j; |
| 463 | int total_length; |
| 464 | int stat; |
| 465 | unsigned long timeout; |
| 466 | unsigned long flags; |
| 467 | |
| 468 | elp_device *adapter = netdev_priv(dev); |
| 469 | |
| 470 | set_hsf(dev, 0); |
| 471 | |
| 472 | /* get the command code */ |
| 473 | timeout = jiffies + 2*HZ/100; |
| 474 | while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout)); |
| 475 | if (time_after_eq(jiffies, timeout)) { |
| 476 | TIMEOUT_MSG(__LINE__); |
| 477 | return false; |
| 478 | } |
| 479 | pcb->command = inb_command(dev->base_addr); |
| 480 | |
| 481 | /* read the data length */ |
| 482 | timeout = jiffies + 3*HZ/100; |
| 483 | while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout)); |
| 484 | if (time_after_eq(jiffies, timeout)) { |
| 485 | TIMEOUT_MSG(__LINE__); |
| 486 | pr_info("%s: status %02x\n", dev->name, stat); |
| 487 | return false; |
| 488 | } |
| 489 | pcb->length = inb_command(dev->base_addr); |
| 490 | |
| 491 | if (pcb->length > MAX_PCB_DATA) { |
| 492 | INVALID_PCB_MSG(pcb->length); |
| 493 | adapter_reset(dev); |
| 494 | return false; |
| 495 | } |
| 496 | /* read the data */ |
| 497 | spin_lock_irqsave(&adapter->lock, flags); |
| 498 | for (i = 0; i < MAX_PCB_DATA; i++) { |
| 499 | for (j = 0; j < 20000; j++) { |
| 500 | stat = get_status(dev->base_addr); |
| 501 | if (stat & ACRF) |
| 502 | break; |
| 503 | } |
| 504 | pcb->data.raw[i] = inb_command(dev->base_addr); |
| 505 | if ((stat & ASF_PCB_MASK) == ASF_PCB_END || j >= 20000) |
| 506 | break; |
| 507 | } |
| 508 | spin_unlock_irqrestore(&adapter->lock, flags); |
| 509 | if (i >= MAX_PCB_DATA) { |
| 510 | INVALID_PCB_MSG(i); |
| 511 | return false; |
| 512 | } |
| 513 | if (j >= 20000) { |
| 514 | TIMEOUT_MSG(__LINE__); |
| 515 | return false; |
| 516 | } |
| 517 | /* the last "data" byte was really the length! */ |
| 518 | total_length = pcb->data.raw[i]; |
| 519 | |
| 520 | /* safety check total length vs data length */ |
| 521 | if (total_length != (pcb->length + 2)) { |
| 522 | if (elp_debug >= 2) |
| 523 | pr_warning("%s: mangled PCB received\n", dev->name); |
| 524 | set_hsf(dev, HSF_PCB_NAK); |
| 525 | return false; |
| 526 | } |
| 527 | |
| 528 | if (pcb->command == CMD_RECEIVE_PACKET_COMPLETE) { |
| 529 | if (test_and_set_bit(0, (void *) &adapter->busy)) { |
| 530 | if (backlog_next(adapter->rx_backlog.in) == adapter->rx_backlog.out) { |
| 531 | set_hsf(dev, HSF_PCB_NAK); |
| 532 | pr_warning("%s: PCB rejected, transfer in progress and backlog full\n", dev->name); |
| 533 | pcb->command = 0; |
| 534 | return true; |
| 535 | } else { |
| 536 | pcb->command = 0xff; |
| 537 | } |
| 538 | } |
| 539 | } |
| 540 | set_hsf(dev, HSF_PCB_ACK); |
| 541 | return true; |
| 542 | } |
| 543 | |
| 544 | /****************************************************** |
| 545 | * |
| 546 | * queue a receive command on the adapter so we will get an |
| 547 | * interrupt when a packet is received. |
| 548 | * |
| 549 | ******************************************************/ |
| 550 | |
| 551 | static bool start_receive(struct net_device *dev, pcb_struct * tx_pcb) |
| 552 | { |
| 553 | bool status; |
| 554 | elp_device *adapter = netdev_priv(dev); |
| 555 | |
| 556 | if (elp_debug >= 3) |
| 557 | pr_debug("%s: restarting receiver\n", dev->name); |
| 558 | tx_pcb->command = CMD_RECEIVE_PACKET; |
| 559 | tx_pcb->length = sizeof(struct Rcv_pkt); |
| 560 | tx_pcb->data.rcv_pkt.buf_seg |
| 561 | = tx_pcb->data.rcv_pkt.buf_ofs = 0; /* Unused */ |
| 562 | tx_pcb->data.rcv_pkt.buf_len = 1600; |
| 563 | tx_pcb->data.rcv_pkt.timeout = 0; /* set timeout to zero */ |
| 564 | status = send_pcb(dev, tx_pcb); |
| 565 | if (status) |
| 566 | adapter->rx_active++; |
| 567 | return status; |
| 568 | } |
| 569 | |
| 570 | /****************************************************** |
| 571 | * |
| 572 | * extract a packet from the adapter |
| 573 | * this routine is only called from within the interrupt |
| 574 | * service routine, so no cli/sti calls are needed |
| 575 | * note that the length is always assumed to be even |
| 576 | * |
| 577 | ******************************************************/ |
| 578 | |
| 579 | static void receive_packet(struct net_device *dev, int len) |
| 580 | { |
| 581 | int rlen; |
| 582 | elp_device *adapter = netdev_priv(dev); |
| 583 | void *target; |
| 584 | struct sk_buff *skb; |
| 585 | unsigned long flags; |
| 586 | |
| 587 | rlen = (len + 1) & ~1; |
| 588 | skb = dev_alloc_skb(rlen + 2); |
| 589 | |
| 590 | if (!skb) { |
| 591 | pr_warning("%s: memory squeeze, dropping packet\n", dev->name); |
| 592 | target = adapter->dma_buffer; |
| 593 | adapter->current_dma.target = NULL; |
| 594 | /* FIXME: stats */ |
| 595 | return; |
| 596 | } |
| 597 | |
| 598 | skb_reserve(skb, 2); |
| 599 | target = skb_put(skb, rlen); |
| 600 | if ((unsigned long)(target + rlen) >= MAX_DMA_ADDRESS) { |
| 601 | adapter->current_dma.target = target; |
| 602 | target = adapter->dma_buffer; |
| 603 | } else { |
| 604 | adapter->current_dma.target = NULL; |
| 605 | } |
| 606 | |
| 607 | /* if this happens, we die */ |
| 608 | if (test_and_set_bit(0, (void *) &adapter->dmaing)) |
| 609 | pr_err("%s: rx blocked, DMA in progress, dir %d\n", |
| 610 | dev->name, adapter->current_dma.direction); |
| 611 | |
| 612 | adapter->current_dma.direction = 0; |
| 613 | adapter->current_dma.length = rlen; |
| 614 | adapter->current_dma.skb = skb; |
| 615 | adapter->current_dma.start_time = jiffies; |
| 616 | |
| 617 | outb_control(adapter->hcr_val | DIR | TCEN | DMAE, dev); |
| 618 | |
| 619 | flags=claim_dma_lock(); |
| 620 | disable_dma(dev->dma); |
| 621 | clear_dma_ff(dev->dma); |
| 622 | set_dma_mode(dev->dma, 0x04); /* dma read */ |
| 623 | set_dma_addr(dev->dma, isa_virt_to_bus(target)); |
| 624 | set_dma_count(dev->dma, rlen); |
| 625 | enable_dma(dev->dma); |
| 626 | release_dma_lock(flags); |
| 627 | |
| 628 | if (elp_debug >= 3) { |
| 629 | pr_debug("%s: rx DMA transfer started\n", dev->name); |
| 630 | } |
| 631 | |
| 632 | if (adapter->rx_active) |
| 633 | adapter->rx_active--; |
| 634 | |
| 635 | if (!adapter->busy) |
| 636 | pr_warning("%s: receive_packet called, busy not set.\n", dev->name); |
| 637 | } |
| 638 | |
| 639 | /****************************************************** |
| 640 | * |
| 641 | * interrupt handler |
| 642 | * |
| 643 | ******************************************************/ |
| 644 | |
| 645 | static irqreturn_t elp_interrupt(int irq, void *dev_id) |
| 646 | { |
| 647 | int len; |
| 648 | int dlen; |
| 649 | int icount = 0; |
| 650 | struct net_device *dev = dev_id; |
| 651 | elp_device *adapter = netdev_priv(dev); |
| 652 | unsigned long timeout; |
| 653 | |
| 654 | spin_lock(&adapter->lock); |
| 655 | |
| 656 | do { |
| 657 | /* |
| 658 | * has a DMA transfer finished? |
| 659 | */ |
| 660 | if (inb_status(dev->base_addr) & DONE) { |
| 661 | if (!adapter->dmaing) |
| 662 | pr_warning("%s: phantom DMA completed\n", dev->name); |
| 663 | |
| 664 | if (elp_debug >= 3) |
| 665 | pr_debug("%s: %s DMA complete, status %02x\n", dev->name, |
| 666 | adapter->current_dma.direction ? "tx" : "rx", |
| 667 | inb_status(dev->base_addr)); |
| 668 | |
| 669 | outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev); |
| 670 | if (adapter->current_dma.direction) { |
| 671 | dev_kfree_skb_irq(adapter->current_dma.skb); |
| 672 | } else { |
| 673 | struct sk_buff *skb = adapter->current_dma.skb; |
| 674 | if (skb) { |
| 675 | if (adapter->current_dma.target) { |
| 676 | /* have already done the skb_put() */ |
| 677 | memcpy(adapter->current_dma.target, adapter->dma_buffer, adapter->current_dma.length); |
| 678 | } |
| 679 | skb->protocol = eth_type_trans(skb,dev); |
| 680 | dev->stats.rx_bytes += skb->len; |
| 681 | netif_rx(skb); |
| 682 | } |
| 683 | } |
| 684 | adapter->dmaing = 0; |
| 685 | if (adapter->rx_backlog.in != adapter->rx_backlog.out) { |
| 686 | int t = adapter->rx_backlog.length[adapter->rx_backlog.out]; |
| 687 | adapter->rx_backlog.out = backlog_next(adapter->rx_backlog.out); |
| 688 | if (elp_debug >= 2) |
| 689 | pr_debug("%s: receiving backlogged packet (%d)\n", dev->name, t); |
| 690 | receive_packet(dev, t); |
| 691 | } else { |
| 692 | adapter->busy = 0; |
| 693 | } |
| 694 | } else { |
| 695 | /* has one timed out? */ |
| 696 | check_3c505_dma(dev); |
| 697 | } |
| 698 | |
| 699 | /* |
| 700 | * receive a PCB from the adapter |
| 701 | */ |
| 702 | timeout = jiffies + 3*HZ/100; |
| 703 | while ((inb_status(dev->base_addr) & ACRF) != 0 && time_before(jiffies, timeout)) { |
| 704 | if (receive_pcb(dev, &adapter->irx_pcb)) { |
| 705 | switch (adapter->irx_pcb.command) |
| 706 | { |
| 707 | case 0: |
| 708 | break; |
| 709 | /* |
| 710 | * received a packet - this must be handled fast |
| 711 | */ |
| 712 | case 0xff: |
| 713 | case CMD_RECEIVE_PACKET_COMPLETE: |
| 714 | /* if the device isn't open, don't pass packets up the stack */ |
| 715 | if (!netif_running(dev)) |
| 716 | break; |
| 717 | len = adapter->irx_pcb.data.rcv_resp.pkt_len; |
| 718 | dlen = adapter->irx_pcb.data.rcv_resp.buf_len; |
| 719 | if (adapter->irx_pcb.data.rcv_resp.timeout != 0) { |
| 720 | pr_err("%s: interrupt - packet not received correctly\n", dev->name); |
| 721 | } else { |
| 722 | if (elp_debug >= 3) { |
| 723 | pr_debug("%s: interrupt - packet received of length %i (%i)\n", |
| 724 | dev->name, len, dlen); |
| 725 | } |
| 726 | if (adapter->irx_pcb.command == 0xff) { |
| 727 | if (elp_debug >= 2) |
| 728 | pr_debug("%s: adding packet to backlog (len = %d)\n", |
| 729 | dev->name, dlen); |
| 730 | adapter->rx_backlog.length[adapter->rx_backlog.in] = dlen; |
| 731 | adapter->rx_backlog.in = backlog_next(adapter->rx_backlog.in); |
| 732 | } else { |
| 733 | receive_packet(dev, dlen); |
| 734 | } |
| 735 | if (elp_debug >= 3) |
| 736 | pr_debug("%s: packet received\n", dev->name); |
| 737 | } |
| 738 | break; |
| 739 | |
| 740 | /* |
| 741 | * 82586 configured correctly |
| 742 | */ |
| 743 | case CMD_CONFIGURE_82586_RESPONSE: |
| 744 | adapter->got[CMD_CONFIGURE_82586] = 1; |
| 745 | if (elp_debug >= 3) |
| 746 | pr_debug("%s: interrupt - configure response received\n", dev->name); |
| 747 | break; |
| 748 | |
| 749 | /* |
| 750 | * Adapter memory configuration |
| 751 | */ |
| 752 | case CMD_CONFIGURE_ADAPTER_RESPONSE: |
| 753 | adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 1; |
| 754 | if (elp_debug >= 3) |
| 755 | pr_debug("%s: Adapter memory configuration %s.\n", dev->name, |
| 756 | adapter->irx_pcb.data.failed ? "failed" : "succeeded"); |
| 757 | break; |
| 758 | |
| 759 | /* |
| 760 | * Multicast list loading |
| 761 | */ |
| 762 | case CMD_LOAD_MULTICAST_RESPONSE: |
| 763 | adapter->got[CMD_LOAD_MULTICAST_LIST] = 1; |
| 764 | if (elp_debug >= 3) |
| 765 | pr_debug("%s: Multicast address list loading %s.\n", dev->name, |
| 766 | adapter->irx_pcb.data.failed ? "failed" : "succeeded"); |
| 767 | break; |
| 768 | |
| 769 | /* |
| 770 | * Station address setting |
| 771 | */ |
| 772 | case CMD_SET_ADDRESS_RESPONSE: |
| 773 | adapter->got[CMD_SET_STATION_ADDRESS] = 1; |
| 774 | if (elp_debug >= 3) |
| 775 | pr_debug("%s: Ethernet address setting %s.\n", dev->name, |
| 776 | adapter->irx_pcb.data.failed ? "failed" : "succeeded"); |
| 777 | break; |
| 778 | |
| 779 | |
| 780 | /* |
| 781 | * received board statistics |
| 782 | */ |
| 783 | case CMD_NETWORK_STATISTICS_RESPONSE: |
| 784 | dev->stats.rx_packets += adapter->irx_pcb.data.netstat.tot_recv; |
| 785 | dev->stats.tx_packets += adapter->irx_pcb.data.netstat.tot_xmit; |
| 786 | dev->stats.rx_crc_errors += adapter->irx_pcb.data.netstat.err_CRC; |
| 787 | dev->stats.rx_frame_errors += adapter->irx_pcb.data.netstat.err_align; |
| 788 | dev->stats.rx_fifo_errors += adapter->irx_pcb.data.netstat.err_ovrrun; |
| 789 | dev->stats.rx_over_errors += adapter->irx_pcb.data.netstat.err_res; |
| 790 | adapter->got[CMD_NETWORK_STATISTICS] = 1; |
| 791 | if (elp_debug >= 3) |
| 792 | pr_debug("%s: interrupt - statistics response received\n", dev->name); |
| 793 | break; |
| 794 | |
| 795 | /* |
| 796 | * sent a packet |
| 797 | */ |
| 798 | case CMD_TRANSMIT_PACKET_COMPLETE: |
| 799 | if (elp_debug >= 3) |
| 800 | pr_debug("%s: interrupt - packet sent\n", dev->name); |
| 801 | if (!netif_running(dev)) |
| 802 | break; |
| 803 | switch (adapter->irx_pcb.data.xmit_resp.c_stat) { |
| 804 | case 0xffff: |
| 805 | dev->stats.tx_aborted_errors++; |
| 806 | pr_info("%s: transmit timed out, network cable problem?\n", dev->name); |
| 807 | break; |
| 808 | case 0xfffe: |
| 809 | dev->stats.tx_fifo_errors++; |
| 810 | pr_info("%s: transmit timed out, FIFO underrun\n", dev->name); |
| 811 | break; |
| 812 | } |
| 813 | netif_wake_queue(dev); |
| 814 | break; |
| 815 | |
| 816 | /* |
| 817 | * some unknown PCB |
| 818 | */ |
| 819 | default: |
| 820 | pr_debug("%s: unknown PCB received - %2.2x\n", |
| 821 | dev->name, adapter->irx_pcb.command); |
| 822 | break; |
| 823 | } |
| 824 | } else { |
| 825 | pr_warning("%s: failed to read PCB on interrupt\n", dev->name); |
| 826 | adapter_reset(dev); |
| 827 | } |
| 828 | } |
| 829 | |
| 830 | } while (icount++ < 5 && (inb_status(dev->base_addr) & (ACRF | DONE))); |
| 831 | |
| 832 | prime_rx(dev); |
| 833 | |
| 834 | /* |
| 835 | * indicate no longer in interrupt routine |
| 836 | */ |
| 837 | spin_unlock(&adapter->lock); |
| 838 | return IRQ_HANDLED; |
| 839 | } |
| 840 | |
| 841 | |
| 842 | /****************************************************** |
| 843 | * |
| 844 | * open the board |
| 845 | * |
| 846 | ******************************************************/ |
| 847 | |
| 848 | static int elp_open(struct net_device *dev) |
| 849 | { |
| 850 | elp_device *adapter = netdev_priv(dev); |
| 851 | int retval; |
| 852 | |
| 853 | if (elp_debug >= 3) |
| 854 | pr_debug("%s: request to open device\n", dev->name); |
| 855 | |
| 856 | /* |
| 857 | * make sure we actually found the device |
| 858 | */ |
| 859 | if (adapter == NULL) { |
| 860 | pr_err("%s: Opening a non-existent physical device\n", dev->name); |
| 861 | return -EAGAIN; |
| 862 | } |
| 863 | /* |
| 864 | * disable interrupts on the board |
| 865 | */ |
| 866 | outb_control(0, dev); |
| 867 | |
| 868 | /* |
| 869 | * clear any pending interrupts |
| 870 | */ |
| 871 | inb_command(dev->base_addr); |
| 872 | adapter_reset(dev); |
| 873 | |
| 874 | /* |
| 875 | * no receive PCBs active |
| 876 | */ |
| 877 | adapter->rx_active = 0; |
| 878 | |
| 879 | adapter->busy = 0; |
| 880 | adapter->send_pcb_semaphore = 0; |
| 881 | adapter->rx_backlog.in = 0; |
| 882 | adapter->rx_backlog.out = 0; |
| 883 | |
| 884 | spin_lock_init(&adapter->lock); |
| 885 | |
| 886 | /* |
| 887 | * install our interrupt service routine |
| 888 | */ |
| 889 | if ((retval = request_irq(dev->irq, &elp_interrupt, 0, dev->name, dev))) { |
| 890 | pr_err("%s: could not allocate IRQ%d\n", dev->name, dev->irq); |
| 891 | return retval; |
| 892 | } |
| 893 | if ((retval = request_dma(dev->dma, dev->name))) { |
| 894 | free_irq(dev->irq, dev); |
| 895 | pr_err("%s: could not allocate DMA%d channel\n", dev->name, dev->dma); |
| 896 | return retval; |
| 897 | } |
| 898 | adapter->dma_buffer = (void *) dma_mem_alloc(DMA_BUFFER_SIZE); |
| 899 | if (!adapter->dma_buffer) { |
| 900 | pr_err("%s: could not allocate DMA buffer\n", dev->name); |
| 901 | free_dma(dev->dma); |
| 902 | free_irq(dev->irq, dev); |
| 903 | return -ENOMEM; |
| 904 | } |
| 905 | adapter->dmaing = 0; |
| 906 | |
| 907 | /* |
| 908 | * enable interrupts on the board |
| 909 | */ |
| 910 | outb_control(CMDE, dev); |
| 911 | |
| 912 | /* |
| 913 | * configure adapter memory: we need 10 multicast addresses, default==0 |
| 914 | */ |
| 915 | if (elp_debug >= 3) |
| 916 | pr_debug("%s: sending 3c505 memory configuration command\n", dev->name); |
| 917 | adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY; |
| 918 | adapter->tx_pcb.data.memconf.cmd_q = 10; |
| 919 | adapter->tx_pcb.data.memconf.rcv_q = 20; |
| 920 | adapter->tx_pcb.data.memconf.mcast = 10; |
| 921 | adapter->tx_pcb.data.memconf.frame = 20; |
| 922 | adapter->tx_pcb.data.memconf.rcv_b = 20; |
| 923 | adapter->tx_pcb.data.memconf.progs = 0; |
| 924 | adapter->tx_pcb.length = sizeof(struct Memconf); |
| 925 | adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 0; |
| 926 | if (!send_pcb(dev, &adapter->tx_pcb)) |
| 927 | pr_err("%s: couldn't send memory configuration command\n", dev->name); |
| 928 | else { |
| 929 | unsigned long timeout = jiffies + TIMEOUT; |
| 930 | while (adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] == 0 && time_before(jiffies, timeout)); |
| 931 | if (time_after_eq(jiffies, timeout)) |
| 932 | TIMEOUT_MSG(__LINE__); |
| 933 | } |
| 934 | |
| 935 | |
| 936 | /* |
| 937 | * configure adapter to receive broadcast messages and wait for response |
| 938 | */ |
| 939 | if (elp_debug >= 3) |
| 940 | pr_debug("%s: sending 82586 configure command\n", dev->name); |
| 941 | adapter->tx_pcb.command = CMD_CONFIGURE_82586; |
| 942 | adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD; |
| 943 | adapter->tx_pcb.length = 2; |
| 944 | adapter->got[CMD_CONFIGURE_82586] = 0; |
| 945 | if (!send_pcb(dev, &adapter->tx_pcb)) |
| 946 | pr_err("%s: couldn't send 82586 configure command\n", dev->name); |
| 947 | else { |
| 948 | unsigned long timeout = jiffies + TIMEOUT; |
| 949 | while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout)); |
| 950 | if (time_after_eq(jiffies, timeout)) |
| 951 | TIMEOUT_MSG(__LINE__); |
| 952 | } |
| 953 | |
| 954 | /* enable burst-mode DMA */ |
| 955 | /* outb(0x1, dev->base_addr + PORT_AUXDMA); */ |
| 956 | |
| 957 | /* |
| 958 | * queue receive commands to provide buffering |
| 959 | */ |
| 960 | prime_rx(dev); |
| 961 | if (elp_debug >= 3) |
| 962 | pr_debug("%s: %d receive PCBs active\n", dev->name, adapter->rx_active); |
| 963 | |
| 964 | /* |
| 965 | * device is now officially open! |
| 966 | */ |
| 967 | |
| 968 | netif_start_queue(dev); |
| 969 | return 0; |
| 970 | } |
| 971 | |
| 972 | |
| 973 | /****************************************************** |
| 974 | * |
| 975 | * send a packet to the adapter |
| 976 | * |
| 977 | ******************************************************/ |
| 978 | |
| 979 | static netdev_tx_t send_packet(struct net_device *dev, struct sk_buff *skb) |
| 980 | { |
| 981 | elp_device *adapter = netdev_priv(dev); |
| 982 | unsigned long target; |
| 983 | unsigned long flags; |
| 984 | |
| 985 | /* |
| 986 | * make sure the length is even and no shorter than 60 bytes |
| 987 | */ |
| 988 | unsigned int nlen = (((skb->len < 60) ? 60 : skb->len) + 1) & (~1); |
| 989 | |
| 990 | if (test_and_set_bit(0, (void *) &adapter->busy)) { |
| 991 | if (elp_debug >= 2) |
| 992 | pr_debug("%s: transmit blocked\n", dev->name); |
| 993 | return false; |
| 994 | } |
| 995 | |
| 996 | dev->stats.tx_bytes += nlen; |
| 997 | |
| 998 | /* |
| 999 | * send the adapter a transmit packet command. Ignore segment and offset |
| 1000 | * and make sure the length is even |
| 1001 | */ |
| 1002 | adapter->tx_pcb.command = CMD_TRANSMIT_PACKET; |
| 1003 | adapter->tx_pcb.length = sizeof(struct Xmit_pkt); |
| 1004 | adapter->tx_pcb.data.xmit_pkt.buf_ofs |
| 1005 | = adapter->tx_pcb.data.xmit_pkt.buf_seg = 0; /* Unused */ |
| 1006 | adapter->tx_pcb.data.xmit_pkt.pkt_len = nlen; |
| 1007 | |
| 1008 | if (!send_pcb(dev, &adapter->tx_pcb)) { |
| 1009 | adapter->busy = 0; |
| 1010 | return false; |
| 1011 | } |
| 1012 | /* if this happens, we die */ |
| 1013 | if (test_and_set_bit(0, (void *) &adapter->dmaing)) |
| 1014 | pr_debug("%s: tx: DMA %d in progress\n", dev->name, adapter->current_dma.direction); |
| 1015 | |
| 1016 | adapter->current_dma.direction = 1; |
| 1017 | adapter->current_dma.start_time = jiffies; |
| 1018 | |
| 1019 | if ((unsigned long)(skb->data + nlen) >= MAX_DMA_ADDRESS || nlen != skb->len) { |
| 1020 | skb_copy_from_linear_data(skb, adapter->dma_buffer, nlen); |
| 1021 | memset(adapter->dma_buffer+skb->len, 0, nlen-skb->len); |
| 1022 | target = isa_virt_to_bus(adapter->dma_buffer); |
| 1023 | } |
| 1024 | else { |
| 1025 | target = isa_virt_to_bus(skb->data); |
| 1026 | } |
| 1027 | adapter->current_dma.skb = skb; |
| 1028 | |
| 1029 | flags=claim_dma_lock(); |
| 1030 | disable_dma(dev->dma); |
| 1031 | clear_dma_ff(dev->dma); |
| 1032 | set_dma_mode(dev->dma, 0x48); /* dma memory -> io */ |
| 1033 | set_dma_addr(dev->dma, target); |
| 1034 | set_dma_count(dev->dma, nlen); |
| 1035 | outb_control(adapter->hcr_val | DMAE | TCEN, dev); |
| 1036 | enable_dma(dev->dma); |
| 1037 | release_dma_lock(flags); |
| 1038 | |
| 1039 | if (elp_debug >= 3) |
| 1040 | pr_debug("%s: DMA transfer started\n", dev->name); |
| 1041 | |
| 1042 | return true; |
| 1043 | } |
| 1044 | |
| 1045 | /* |
| 1046 | * The upper layer thinks we timed out |
| 1047 | */ |
| 1048 | |
| 1049 | static void elp_timeout(struct net_device *dev) |
| 1050 | { |
| 1051 | int stat; |
| 1052 | |
| 1053 | stat = inb_status(dev->base_addr); |
| 1054 | pr_warning("%s: transmit timed out, lost %s?\n", dev->name, |
| 1055 | (stat & ACRF) ? "interrupt" : "command"); |
| 1056 | if (elp_debug >= 1) |
| 1057 | pr_debug("%s: status %#02x\n", dev->name, stat); |
| 1058 | dev->trans_start = jiffies; |
| 1059 | dev->stats.tx_dropped++; |
| 1060 | netif_wake_queue(dev); |
| 1061 | } |
| 1062 | |
| 1063 | /****************************************************** |
| 1064 | * |
| 1065 | * start the transmitter |
| 1066 | * return 0 if sent OK, else return 1 |
| 1067 | * |
| 1068 | ******************************************************/ |
| 1069 | |
| 1070 | static netdev_tx_t elp_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 1071 | { |
| 1072 | unsigned long flags; |
| 1073 | elp_device *adapter = netdev_priv(dev); |
| 1074 | |
| 1075 | spin_lock_irqsave(&adapter->lock, flags); |
| 1076 | check_3c505_dma(dev); |
| 1077 | |
| 1078 | if (elp_debug >= 3) |
| 1079 | pr_debug("%s: request to send packet of length %d\n", dev->name, (int) skb->len); |
| 1080 | |
| 1081 | netif_stop_queue(dev); |
| 1082 | |
| 1083 | /* |
| 1084 | * send the packet at skb->data for skb->len |
| 1085 | */ |
| 1086 | if (!send_packet(dev, skb)) { |
| 1087 | if (elp_debug >= 2) { |
| 1088 | pr_debug("%s: failed to transmit packet\n", dev->name); |
| 1089 | } |
| 1090 | spin_unlock_irqrestore(&adapter->lock, flags); |
| 1091 | return NETDEV_TX_BUSY; |
| 1092 | } |
| 1093 | if (elp_debug >= 3) |
| 1094 | pr_debug("%s: packet of length %d sent\n", dev->name, (int) skb->len); |
| 1095 | |
| 1096 | /* |
| 1097 | * start the transmit timeout |
| 1098 | */ |
| 1099 | dev->trans_start = jiffies; |
| 1100 | |
| 1101 | prime_rx(dev); |
| 1102 | spin_unlock_irqrestore(&adapter->lock, flags); |
| 1103 | netif_start_queue(dev); |
| 1104 | return NETDEV_TX_OK; |
| 1105 | } |
| 1106 | |
| 1107 | /****************************************************** |
| 1108 | * |
| 1109 | * return statistics on the board |
| 1110 | * |
| 1111 | ******************************************************/ |
| 1112 | |
| 1113 | static struct net_device_stats *elp_get_stats(struct net_device *dev) |
| 1114 | { |
| 1115 | elp_device *adapter = netdev_priv(dev); |
| 1116 | |
| 1117 | if (elp_debug >= 3) |
| 1118 | pr_debug("%s: request for stats\n", dev->name); |
| 1119 | |
| 1120 | /* If the device is closed, just return the latest stats we have, |
| 1121 | - we cannot ask from the adapter without interrupts */ |
| 1122 | if (!netif_running(dev)) |
| 1123 | return &dev->stats; |
| 1124 | |
| 1125 | /* send a get statistics command to the board */ |
| 1126 | adapter->tx_pcb.command = CMD_NETWORK_STATISTICS; |
| 1127 | adapter->tx_pcb.length = 0; |
| 1128 | adapter->got[CMD_NETWORK_STATISTICS] = 0; |
| 1129 | if (!send_pcb(dev, &adapter->tx_pcb)) |
| 1130 | pr_err("%s: couldn't send get statistics command\n", dev->name); |
| 1131 | else { |
| 1132 | unsigned long timeout = jiffies + TIMEOUT; |
| 1133 | while (adapter->got[CMD_NETWORK_STATISTICS] == 0 && time_before(jiffies, timeout)); |
| 1134 | if (time_after_eq(jiffies, timeout)) { |
| 1135 | TIMEOUT_MSG(__LINE__); |
| 1136 | return &dev->stats; |
| 1137 | } |
| 1138 | } |
| 1139 | |
| 1140 | /* statistics are now up to date */ |
| 1141 | return &dev->stats; |
| 1142 | } |
| 1143 | |
| 1144 | |
| 1145 | static void netdev_get_drvinfo(struct net_device *dev, |
| 1146 | struct ethtool_drvinfo *info) |
| 1147 | { |
| 1148 | strcpy(info->driver, DRV_NAME); |
| 1149 | strcpy(info->version, DRV_VERSION); |
| 1150 | sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr); |
| 1151 | } |
| 1152 | |
| 1153 | static u32 netdev_get_msglevel(struct net_device *dev) |
| 1154 | { |
| 1155 | return debug; |
| 1156 | } |
| 1157 | |
| 1158 | static void netdev_set_msglevel(struct net_device *dev, u32 level) |
| 1159 | { |
| 1160 | debug = level; |
| 1161 | } |
| 1162 | |
| 1163 | static const struct ethtool_ops netdev_ethtool_ops = { |
| 1164 | .get_drvinfo = netdev_get_drvinfo, |
| 1165 | .get_msglevel = netdev_get_msglevel, |
| 1166 | .set_msglevel = netdev_set_msglevel, |
| 1167 | }; |
| 1168 | |
| 1169 | /****************************************************** |
| 1170 | * |
| 1171 | * close the board |
| 1172 | * |
| 1173 | ******************************************************/ |
| 1174 | |
| 1175 | static int elp_close(struct net_device *dev) |
| 1176 | { |
| 1177 | elp_device *adapter = netdev_priv(dev); |
| 1178 | |
| 1179 | if (elp_debug >= 3) |
| 1180 | pr_debug("%s: request to close device\n", dev->name); |
| 1181 | |
| 1182 | netif_stop_queue(dev); |
| 1183 | |
| 1184 | /* Someone may request the device statistic information even when |
| 1185 | * the interface is closed. The following will update the statistics |
| 1186 | * structure in the driver, so we'll be able to give current statistics. |
| 1187 | */ |
| 1188 | (void) elp_get_stats(dev); |
| 1189 | |
| 1190 | /* |
| 1191 | * disable interrupts on the board |
| 1192 | */ |
| 1193 | outb_control(0, dev); |
| 1194 | |
| 1195 | /* |
| 1196 | * release the IRQ |
| 1197 | */ |
| 1198 | free_irq(dev->irq, dev); |
| 1199 | |
| 1200 | free_dma(dev->dma); |
| 1201 | free_pages((unsigned long) adapter->dma_buffer, get_order(DMA_BUFFER_SIZE)); |
| 1202 | |
| 1203 | return 0; |
| 1204 | } |
| 1205 | |
| 1206 | |
| 1207 | /************************************************************ |
| 1208 | * |
| 1209 | * Set multicast list |
| 1210 | * num_addrs==0: clear mc_list |
| 1211 | * num_addrs==-1: set promiscuous mode |
| 1212 | * num_addrs>0: set mc_list |
| 1213 | * |
| 1214 | ************************************************************/ |
| 1215 | |
| 1216 | static void elp_set_mc_list(struct net_device *dev) |
| 1217 | { |
| 1218 | elp_device *adapter = netdev_priv(dev); |
| 1219 | struct dev_mc_list *dmi = dev->mc_list; |
| 1220 | int i; |
| 1221 | unsigned long flags; |
| 1222 | |
| 1223 | if (elp_debug >= 3) |
| 1224 | pr_debug("%s: request to set multicast list\n", dev->name); |
| 1225 | |
| 1226 | spin_lock_irqsave(&adapter->lock, flags); |
| 1227 | |
| 1228 | if (!(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) { |
| 1229 | /* send a "load multicast list" command to the board, max 10 addrs/cmd */ |
| 1230 | /* if num_addrs==0 the list will be cleared */ |
| 1231 | adapter->tx_pcb.command = CMD_LOAD_MULTICAST_LIST; |
| 1232 | adapter->tx_pcb.length = 6 * dev->mc_count; |
| 1233 | for (i = 0; i < dev->mc_count; i++) { |
| 1234 | memcpy(adapter->tx_pcb.data.multicast[i], dmi->dmi_addr, 6); |
| 1235 | dmi = dmi->next; |
| 1236 | } |
| 1237 | adapter->got[CMD_LOAD_MULTICAST_LIST] = 0; |
| 1238 | if (!send_pcb(dev, &adapter->tx_pcb)) |
| 1239 | pr_err("%s: couldn't send set_multicast command\n", dev->name); |
| 1240 | else { |
| 1241 | unsigned long timeout = jiffies + TIMEOUT; |
| 1242 | while (adapter->got[CMD_LOAD_MULTICAST_LIST] == 0 && time_before(jiffies, timeout)); |
| 1243 | if (time_after_eq(jiffies, timeout)) { |
| 1244 | TIMEOUT_MSG(__LINE__); |
| 1245 | } |
| 1246 | } |
| 1247 | if (dev->mc_count) |
| 1248 | adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD | RECV_MULTI; |
| 1249 | else /* num_addrs == 0 */ |
| 1250 | adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD; |
| 1251 | } else |
| 1252 | adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_PROMISC; |
| 1253 | /* |
| 1254 | * configure adapter to receive messages (as specified above) |
| 1255 | * and wait for response |
| 1256 | */ |
| 1257 | if (elp_debug >= 3) |
| 1258 | pr_debug("%s: sending 82586 configure command\n", dev->name); |
| 1259 | adapter->tx_pcb.command = CMD_CONFIGURE_82586; |
| 1260 | adapter->tx_pcb.length = 2; |
| 1261 | adapter->got[CMD_CONFIGURE_82586] = 0; |
| 1262 | if (!send_pcb(dev, &adapter->tx_pcb)) |
| 1263 | { |
| 1264 | spin_unlock_irqrestore(&adapter->lock, flags); |
| 1265 | pr_err("%s: couldn't send 82586 configure command\n", dev->name); |
| 1266 | } |
| 1267 | else { |
| 1268 | unsigned long timeout = jiffies + TIMEOUT; |
| 1269 | spin_unlock_irqrestore(&adapter->lock, flags); |
| 1270 | while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout)); |
| 1271 | if (time_after_eq(jiffies, timeout)) |
| 1272 | TIMEOUT_MSG(__LINE__); |
| 1273 | } |
| 1274 | } |
| 1275 | |
| 1276 | /************************************************************ |
| 1277 | * |
| 1278 | * A couple of tests to see if there's 3C505 or not |
| 1279 | * Called only by elp_autodetect |
| 1280 | ************************************************************/ |
| 1281 | |
| 1282 | static int __init elp_sense(struct net_device *dev) |
| 1283 | { |
| 1284 | int addr = dev->base_addr; |
| 1285 | const char *name = dev->name; |
| 1286 | byte orig_HSR; |
| 1287 | |
| 1288 | if (!request_region(addr, ELP_IO_EXTENT, "3c505")) |
| 1289 | return -ENODEV; |
| 1290 | |
| 1291 | orig_HSR = inb_status(addr); |
| 1292 | |
| 1293 | if (elp_debug > 0) |
| 1294 | pr_debug(search_msg, name, addr); |
| 1295 | |
| 1296 | if (orig_HSR == 0xff) { |
| 1297 | if (elp_debug > 0) |
| 1298 | pr_cont(notfound_msg, 1); |
| 1299 | goto out; |
| 1300 | } |
| 1301 | |
| 1302 | /* Wait for a while; the adapter may still be booting up */ |
| 1303 | if (elp_debug > 0) |
| 1304 | pr_cont(stilllooking_msg); |
| 1305 | |
| 1306 | if (orig_HSR & DIR) { |
| 1307 | /* If HCR.DIR is up, we pull it down. HSR.DIR should follow. */ |
| 1308 | outb(0, dev->base_addr + PORT_CONTROL); |
| 1309 | msleep(300); |
| 1310 | if (inb_status(addr) & DIR) { |
| 1311 | if (elp_debug > 0) |
| 1312 | pr_cont(notfound_msg, 2); |
| 1313 | goto out; |
| 1314 | } |
| 1315 | } else { |
| 1316 | /* If HCR.DIR is down, we pull it up. HSR.DIR should follow. */ |
| 1317 | outb(DIR, dev->base_addr + PORT_CONTROL); |
| 1318 | msleep(300); |
| 1319 | if (!(inb_status(addr) & DIR)) { |
| 1320 | if (elp_debug > 0) |
| 1321 | pr_cont(notfound_msg, 3); |
| 1322 | goto out; |
| 1323 | } |
| 1324 | } |
| 1325 | /* |
| 1326 | * It certainly looks like a 3c505. |
| 1327 | */ |
| 1328 | if (elp_debug > 0) |
| 1329 | pr_cont(found_msg); |
| 1330 | |
| 1331 | return 0; |
| 1332 | out: |
| 1333 | release_region(addr, ELP_IO_EXTENT); |
| 1334 | return -ENODEV; |
| 1335 | } |
| 1336 | |
| 1337 | /************************************************************* |
| 1338 | * |
| 1339 | * Search through addr_list[] and try to find a 3C505 |
| 1340 | * Called only by eplus_probe |
| 1341 | *************************************************************/ |
| 1342 | |
| 1343 | static int __init elp_autodetect(struct net_device *dev) |
| 1344 | { |
| 1345 | int idx = 0; |
| 1346 | |
| 1347 | /* if base address set, then only check that address |
| 1348 | otherwise, run through the table */ |
| 1349 | if (dev->base_addr != 0) { /* dev->base_addr == 0 ==> plain autodetect */ |
| 1350 | if (elp_sense(dev) == 0) |
| 1351 | return dev->base_addr; |
| 1352 | } else |
| 1353 | while ((dev->base_addr = addr_list[idx++])) { |
| 1354 | if (elp_sense(dev) == 0) |
| 1355 | return dev->base_addr; |
| 1356 | } |
| 1357 | |
| 1358 | /* could not find an adapter */ |
| 1359 | if (elp_debug > 0) |
| 1360 | pr_debug(couldnot_msg, dev->name); |
| 1361 | |
| 1362 | return 0; /* Because of this, the layer above will return -ENODEV */ |
| 1363 | } |
| 1364 | |
| 1365 | static const struct net_device_ops elp_netdev_ops = { |
| 1366 | .ndo_open = elp_open, |
| 1367 | .ndo_stop = elp_close, |
| 1368 | .ndo_get_stats = elp_get_stats, |
| 1369 | .ndo_start_xmit = elp_start_xmit, |
| 1370 | .ndo_tx_timeout = elp_timeout, |
| 1371 | .ndo_set_multicast_list = elp_set_mc_list, |
| 1372 | .ndo_change_mtu = eth_change_mtu, |
| 1373 | .ndo_set_mac_address = eth_mac_addr, |
| 1374 | .ndo_validate_addr = eth_validate_addr, |
| 1375 | }; |
| 1376 | |
| 1377 | /****************************************************** |
| 1378 | * |
| 1379 | * probe for an Etherlink Plus board at the specified address |
| 1380 | * |
| 1381 | ******************************************************/ |
| 1382 | |
| 1383 | /* There are three situations we need to be able to detect here: |
| 1384 | |
| 1385 | * a) the card is idle |
| 1386 | * b) the card is still booting up |
| 1387 | * c) the card is stuck in a strange state (some DOS drivers do this) |
| 1388 | * |
| 1389 | * In case (a), all is well. In case (b), we wait 10 seconds to see if the |
| 1390 | * card finishes booting, and carry on if so. In case (c), we do a hard reset, |
| 1391 | * loop round, and hope for the best. |
| 1392 | * |
| 1393 | * This is all very unpleasant, but hopefully avoids the problems with the old |
| 1394 | * probe code (which had a 15-second delay if the card was idle, and didn't |
| 1395 | * work at all if it was in a weird state). |
| 1396 | */ |
| 1397 | |
| 1398 | static int __init elplus_setup(struct net_device *dev) |
| 1399 | { |
| 1400 | elp_device *adapter = netdev_priv(dev); |
| 1401 | int i, tries, tries1, okay; |
| 1402 | unsigned long timeout; |
| 1403 | unsigned long cookie = 0; |
| 1404 | int err = -ENODEV; |
| 1405 | |
| 1406 | /* |
| 1407 | * setup adapter structure |
| 1408 | */ |
| 1409 | |
| 1410 | dev->base_addr = elp_autodetect(dev); |
| 1411 | if (!dev->base_addr) |
| 1412 | return -ENODEV; |
| 1413 | |
| 1414 | adapter->send_pcb_semaphore = 0; |
| 1415 | |
| 1416 | for (tries1 = 0; tries1 < 3; tries1++) { |
| 1417 | outb_control((adapter->hcr_val | CMDE) & ~DIR, dev); |
| 1418 | /* First try to write just one byte, to see if the card is |
| 1419 | * responding at all normally. |
| 1420 | */ |
| 1421 | timeout = jiffies + 5*HZ/100; |
| 1422 | okay = 0; |
| 1423 | while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE)); |
| 1424 | if ((inb_status(dev->base_addr) & HCRE)) { |
| 1425 | outb_command(0, dev->base_addr); /* send a spurious byte */ |
| 1426 | timeout = jiffies + 5*HZ/100; |
| 1427 | while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE)); |
| 1428 | if (inb_status(dev->base_addr) & HCRE) |
| 1429 | okay = 1; |
| 1430 | } |
| 1431 | if (!okay) { |
| 1432 | /* Nope, it's ignoring the command register. This means that |
| 1433 | * either it's still booting up, or it's died. |
| 1434 | */ |
| 1435 | pr_err("%s: command register wouldn't drain, ", dev->name); |
| 1436 | if ((inb_status(dev->base_addr) & 7) == 3) { |
| 1437 | /* If the adapter status is 3, it *could* still be booting. |
| 1438 | * Give it the benefit of the doubt for 10 seconds. |
| 1439 | */ |
| 1440 | pr_cont("assuming 3c505 still starting\n"); |
| 1441 | timeout = jiffies + 10*HZ; |
| 1442 | while (time_before(jiffies, timeout) && (inb_status(dev->base_addr) & 7)); |
| 1443 | if (inb_status(dev->base_addr) & 7) { |
| 1444 | pr_err("%s: 3c505 failed to start\n", dev->name); |
| 1445 | } else { |
| 1446 | okay = 1; /* It started */ |
| 1447 | } |
| 1448 | } else { |
| 1449 | /* Otherwise, it must just be in a strange |
| 1450 | * state. We probably need to kick it. |
| 1451 | */ |
| 1452 | pr_cont("3c505 is sulking\n"); |
| 1453 | } |
| 1454 | } |
| 1455 | for (tries = 0; tries < 5 && okay; tries++) { |
| 1456 | |
| 1457 | /* |
| 1458 | * Try to set the Ethernet address, to make sure that the board |
| 1459 | * is working. |
| 1460 | */ |
| 1461 | adapter->tx_pcb.command = CMD_STATION_ADDRESS; |
| 1462 | adapter->tx_pcb.length = 0; |
| 1463 | cookie = probe_irq_on(); |
| 1464 | if (!send_pcb(dev, &adapter->tx_pcb)) { |
| 1465 | pr_err("%s: could not send first PCB\n", dev->name); |
| 1466 | probe_irq_off(cookie); |
| 1467 | continue; |
| 1468 | } |
| 1469 | if (!receive_pcb(dev, &adapter->rx_pcb)) { |
| 1470 | pr_err("%s: could not read first PCB\n", dev->name); |
| 1471 | probe_irq_off(cookie); |
| 1472 | continue; |
| 1473 | } |
| 1474 | if ((adapter->rx_pcb.command != CMD_ADDRESS_RESPONSE) || |
| 1475 | (adapter->rx_pcb.length != 6)) { |
| 1476 | pr_err("%s: first PCB wrong (%d, %d)\n", dev->name, |
| 1477 | adapter->rx_pcb.command, adapter->rx_pcb.length); |
| 1478 | probe_irq_off(cookie); |
| 1479 | continue; |
| 1480 | } |
| 1481 | goto okay; |
| 1482 | } |
| 1483 | /* It's broken. Do a hard reset to re-initialise the board, |
| 1484 | * and try again. |
| 1485 | */ |
| 1486 | pr_info("%s: resetting adapter\n", dev->name); |
| 1487 | outb_control(adapter->hcr_val | FLSH | ATTN, dev); |
| 1488 | outb_control(adapter->hcr_val & ~(FLSH | ATTN), dev); |
| 1489 | } |
| 1490 | pr_err("%s: failed to initialise 3c505\n", dev->name); |
| 1491 | goto out; |
| 1492 | |
| 1493 | okay: |
| 1494 | if (dev->irq) { /* Is there a preset IRQ? */ |
| 1495 | int rpt = probe_irq_off(cookie); |
| 1496 | if (dev->irq != rpt) { |
| 1497 | pr_warning("%s: warning, irq %d configured but %d detected\n", dev->name, dev->irq, rpt); |
| 1498 | } |
| 1499 | /* if dev->irq == probe_irq_off(cookie), all is well */ |
| 1500 | } else /* No preset IRQ; just use what we can detect */ |
| 1501 | dev->irq = probe_irq_off(cookie); |
| 1502 | switch (dev->irq) { /* Legal, sane? */ |
| 1503 | case 0: |
| 1504 | pr_err("%s: IRQ probe failed: check 3c505 jumpers.\n", |
| 1505 | dev->name); |
| 1506 | goto out; |
| 1507 | case 1: |
| 1508 | case 6: |
| 1509 | case 8: |
| 1510 | case 13: |
| 1511 | pr_err("%s: Impossible IRQ %d reported by probe_irq_off().\n", |
| 1512 | dev->name, dev->irq); |
| 1513 | goto out; |
| 1514 | } |
| 1515 | /* |
| 1516 | * Now we have the IRQ number so we can disable the interrupts from |
| 1517 | * the board until the board is opened. |
| 1518 | */ |
| 1519 | outb_control(adapter->hcr_val & ~CMDE, dev); |
| 1520 | |
| 1521 | /* |
| 1522 | * copy Ethernet address into structure |
| 1523 | */ |
| 1524 | for (i = 0; i < 6; i++) |
| 1525 | dev->dev_addr[i] = adapter->rx_pcb.data.eth_addr[i]; |
| 1526 | |
| 1527 | /* find a DMA channel */ |
| 1528 | if (!dev->dma) { |
| 1529 | if (dev->mem_start) { |
| 1530 | dev->dma = dev->mem_start & 7; |
| 1531 | } |
| 1532 | else { |
| 1533 | pr_warning("%s: warning, DMA channel not specified, using default\n", dev->name); |
| 1534 | dev->dma = ELP_DMA; |
| 1535 | } |
| 1536 | } |
| 1537 | |
| 1538 | /* |
| 1539 | * print remainder of startup message |
| 1540 | */ |
| 1541 | pr_info("%s: 3c505 at %#lx, irq %d, dma %d, addr %pM, ", |
| 1542 | dev->name, dev->base_addr, dev->irq, dev->dma, dev->dev_addr); |
| 1543 | /* |
| 1544 | * read more information from the adapter |
| 1545 | */ |
| 1546 | |
| 1547 | adapter->tx_pcb.command = CMD_ADAPTER_INFO; |
| 1548 | adapter->tx_pcb.length = 0; |
| 1549 | if (!send_pcb(dev, &adapter->tx_pcb) || |
| 1550 | !receive_pcb(dev, &adapter->rx_pcb) || |
| 1551 | (adapter->rx_pcb.command != CMD_ADAPTER_INFO_RESPONSE) || |
| 1552 | (adapter->rx_pcb.length != 10)) { |
| 1553 | pr_cont("not responding to second PCB\n"); |
| 1554 | } |
| 1555 | pr_cont("rev %d.%d, %dk\n", adapter->rx_pcb.data.info.major_vers, |
| 1556 | adapter->rx_pcb.data.info.minor_vers, adapter->rx_pcb.data.info.RAM_sz); |
| 1557 | |
| 1558 | /* |
| 1559 | * reconfigure the adapter memory to better suit our purposes |
| 1560 | */ |
| 1561 | adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY; |
| 1562 | adapter->tx_pcb.length = 12; |
| 1563 | adapter->tx_pcb.data.memconf.cmd_q = 8; |
| 1564 | adapter->tx_pcb.data.memconf.rcv_q = 8; |
| 1565 | adapter->tx_pcb.data.memconf.mcast = 10; |
| 1566 | adapter->tx_pcb.data.memconf.frame = 10; |
| 1567 | adapter->tx_pcb.data.memconf.rcv_b = 10; |
| 1568 | adapter->tx_pcb.data.memconf.progs = 0; |
| 1569 | if (!send_pcb(dev, &adapter->tx_pcb) || |
| 1570 | !receive_pcb(dev, &adapter->rx_pcb) || |
| 1571 | (adapter->rx_pcb.command != CMD_CONFIGURE_ADAPTER_RESPONSE) || |
| 1572 | (adapter->rx_pcb.length != 2)) { |
| 1573 | pr_err("%s: could not configure adapter memory\n", dev->name); |
| 1574 | } |
| 1575 | if (adapter->rx_pcb.data.configure) { |
| 1576 | pr_err("%s: adapter configuration failed\n", dev->name); |
| 1577 | } |
| 1578 | |
| 1579 | dev->netdev_ops = &elp_netdev_ops; |
| 1580 | dev->watchdog_timeo = 10*HZ; |
| 1581 | dev->ethtool_ops = &netdev_ethtool_ops; /* local */ |
| 1582 | |
| 1583 | dev->mem_start = dev->mem_end = 0; |
| 1584 | |
| 1585 | err = register_netdev(dev); |
| 1586 | if (err) |
| 1587 | goto out; |
| 1588 | |
| 1589 | return 0; |
| 1590 | out: |
| 1591 | release_region(dev->base_addr, ELP_IO_EXTENT); |
| 1592 | return err; |
| 1593 | } |
| 1594 | |
| 1595 | #ifndef MODULE |
| 1596 | struct net_device * __init elplus_probe(int unit) |
| 1597 | { |
| 1598 | struct net_device *dev = alloc_etherdev(sizeof(elp_device)); |
| 1599 | int err; |
| 1600 | if (!dev) |
| 1601 | return ERR_PTR(-ENOMEM); |
| 1602 | |
| 1603 | sprintf(dev->name, "eth%d", unit); |
| 1604 | netdev_boot_setup_check(dev); |
| 1605 | |
| 1606 | err = elplus_setup(dev); |
| 1607 | if (err) { |
| 1608 | free_netdev(dev); |
| 1609 | return ERR_PTR(err); |
| 1610 | } |
| 1611 | return dev; |
| 1612 | } |
| 1613 | |
| 1614 | #else |
| 1615 | static struct net_device *dev_3c505[ELP_MAX_CARDS]; |
| 1616 | static int io[ELP_MAX_CARDS]; |
| 1617 | static int irq[ELP_MAX_CARDS]; |
| 1618 | static int dma[ELP_MAX_CARDS]; |
| 1619 | module_param_array(io, int, NULL, 0); |
| 1620 | module_param_array(irq, int, NULL, 0); |
| 1621 | module_param_array(dma, int, NULL, 0); |
| 1622 | MODULE_PARM_DESC(io, "EtherLink Plus I/O base address(es)"); |
| 1623 | MODULE_PARM_DESC(irq, "EtherLink Plus IRQ number(s) (assigned)"); |
| 1624 | MODULE_PARM_DESC(dma, "EtherLink Plus DMA channel(s)"); |
| 1625 | |
| 1626 | int __init init_module(void) |
| 1627 | { |
| 1628 | int this_dev, found = 0; |
| 1629 | |
| 1630 | for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) { |
| 1631 | struct net_device *dev = alloc_etherdev(sizeof(elp_device)); |
| 1632 | if (!dev) |
| 1633 | break; |
| 1634 | |
| 1635 | dev->irq = irq[this_dev]; |
| 1636 | dev->base_addr = io[this_dev]; |
| 1637 | if (dma[this_dev]) { |
| 1638 | dev->dma = dma[this_dev]; |
| 1639 | } else { |
| 1640 | dev->dma = ELP_DMA; |
| 1641 | pr_warning("3c505.c: warning, using default DMA channel,\n"); |
| 1642 | } |
| 1643 | if (io[this_dev] == 0) { |
| 1644 | if (this_dev) { |
| 1645 | free_netdev(dev); |
| 1646 | break; |
| 1647 | } |
| 1648 | pr_notice("3c505.c: module autoprobe not recommended, give io=xx.\n"); |
| 1649 | } |
| 1650 | if (elplus_setup(dev) != 0) { |
| 1651 | pr_warning("3c505.c: Failed to register card at 0x%x.\n", io[this_dev]); |
| 1652 | free_netdev(dev); |
| 1653 | break; |
| 1654 | } |
| 1655 | dev_3c505[this_dev] = dev; |
| 1656 | found++; |
| 1657 | } |
| 1658 | if (!found) |
| 1659 | return -ENODEV; |
| 1660 | return 0; |
| 1661 | } |
| 1662 | |
| 1663 | void __exit cleanup_module(void) |
| 1664 | { |
| 1665 | int this_dev; |
| 1666 | |
| 1667 | for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) { |
| 1668 | struct net_device *dev = dev_3c505[this_dev]; |
| 1669 | if (dev) { |
| 1670 | unregister_netdev(dev); |
| 1671 | release_region(dev->base_addr, ELP_IO_EXTENT); |
| 1672 | free_netdev(dev); |
| 1673 | } |
| 1674 | } |
| 1675 | } |
| 1676 | |
| 1677 | #endif /* MODULE */ |
| 1678 | MODULE_LICENSE("GPL"); |